I've tried a few pres, I wouldn't recommend mypre, jack3d micro or bulk powders own one personally they didn't do a lot for me.
I've used grenade 50 cal that was really good but tasted horrendous, currently using ANS Ritual and I think it's really good. The taste isn't great as its "icy blue freeze" but it's easy enough to drink and the results are good.
I got some of them Alpha men vitamins, It's like pissing yellow highlighter fluid!